Some solrconfig.xml changes

* Remove query event listeners - static warming is of no use to
  Yokozuna.

* Remove query handler - user can pass in indent param to select
  handler.

* Add TODO for SolrCell.

* Uncomment field and document analysis handlers - I think this
  still might be useful to keep for now.

* Remove dump handler.

* Remove clustering handler.

* Uncomment terms handler - this could be useful for getting
  information on Yokozuna speical fields.